eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.21.15  netmask 255.255.0.0  broadcast 192.168.255.255
        ether 52:54:00:57:7d:0b  txqueuelen 1000  (Ethernet)
        RX packets 611934520  bytes 881490632870 (820.9 GiB)
        RX errors 0  dropped 150076  overruns 0  frame 0
        TX packets 99488688  bytes 13402165992 (12.4 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 118724  bytes 162642538 (155.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 118724  bytes 162642538 (155.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

